各位大虾帮忙看一下这个4*4键盘扫描程序有什么问题在此谢过

tvn · 发表于2009-10-17 10:31

各位大虾帮忙看一下这个4*4键盘扫描程序有什么问题在此谢过 [复制链接]

int keyscan()
{
P0=0x0f;
if(P0&0x0f!=0x0f)
{
   delay();
P04=0;
P05=1;
P06=1;
P07=1;
if(P0!=0xef)
{
lie=1;
switch(P0)
{
case 0xee:
   hang=1;
   break;
case 0xed:
   hang=2;
case 0xeb:
   hang=3;
case 0xe7:
   hang=4;
default:
   break;
}
}
P04=1;
P05=0;
P06=1;
P07=1;
if(P0!=0xdf)
{
lie=2;
switch(P0)
{
case 0xde:
   hang=1;
   break;
case 0xdd:
   hang=2;
   break;
case 0xdb:
   hang=3;
   break;
case 0xd7:
   hang=4;
   break;
default:
   break;
}
}
P04=1;
P05=1;
P06=0;
P07=1;
if(P0!=0xbf)
{
lie=3;
switch(P0)
{
case 0xbe:
   hang=1;
   break;
case 0xbd:
   hang=2;
   break;
case 0xbb:
   hang=3;
   break;
case 0xb7:
   hang=4;
   break;
default:
   break;
}
}
P04=1;
P05=1;
P06=1;
P07=0;
if(P0!=0x7f)
{
lie=4;
switch(P0)
{
case 0x7e:
   hang=1;
   break;
case 0x7d:
   hang=2;
   break;
case 0x7b:
   hang=3;
   break;
case 0x77:
   hang=4;
   break;
default:
   break;
}
a[0]=hang;
a[1]=lie;
return a;
  }
  else
  {
return 0;
  }
}
}

frank_wt · 发表于2009-10-27 11:38

写得太复杂;了

linxiuhua · 发表于2009-10-27 11:55

哥，你这程序毛病一大堆的啊

pilot

#include
#define uint unsigned int
#define uchar unsigned char
sbit dula=P2^6;
sbit wela=P2^7;
sbit key1=P3^4;
uchar code table[]={
0x3f,0x06,0x5b,0x4f,
0x66,0x6d,0x7d,0x07,
0x7f,0x6f,0x77,0x7c,
0x39,0x5e,0x79,0x71,0};
uchar num,temp,num1;
void delay(uint z)
{
uint x,y;
for(x=z;x>0;x--)
for(y=110;y>0;y--);
}
uchar keyscan();
void display(uchar aa);
void main()
{
num=17;
dula=1;
P0=0;
dula=0;
wela=1;
P0=0xc0;
wela=0;

while(1)
{
display(keyscan());
}
}
void display(uchar aa)
{
dula=1;
P0=table[aa-1];
dula=0;
}
uchar keyscan()
{
P3=0xfe;
temp=P3;
temp=temp&0xf0;
while(temp!=0xf0)
{
delay(5);
temp=P3;
temp=temp&0xf0;
while(temp!=0xf0)
{
temp=P3;
switch(temp)
{
case 0xee:num=1;
break;
case 0xde:num=2;
break;
case 0xbe:num=3;
break;
case 0x7e:num=4;
break;
}
while(temp!=0xf0)
{
temp=P3;
temp=temp&0xf0;
}
}
}

P3=0xfd;
temp=P3;
temp=temp&0xf0;
while(temp!=0xf0)
{
delay(5);
temp=P3;
temp=temp&0xf0;
while(temp!=0xf0)
{
temp=P3;
switch(temp)
{
case 0xed:num=5;
break;
case 0xdd:num=6;
break;
case 0xbd:num=7;
break;
case 0x7d:num=8;
break;
}
while(temp!=0xf0)
{
temp=P3;
temp=temp&0xf0;
}
}
}

P3=0xfb;
temp=P3;
temp=temp&0xf0;
while(temp!=0xf0)
{
delay(5);
temp=P3;
temp=temp&0xf0;
while(temp!=0xf0)
{
temp=P3;
switch(temp)
{
case 0xeb:num=9;
break;
case 0xdb:num=10;
break;
case 0xbb:num=11;
break;
case 0x7b:num=12;
break;
}
while(temp!=0xf0)
{
temp=P3;
temp=temp&0xf0;
}
}
}

P3=0xf7;
temp=P3;
temp=temp&0xf0;
while(temp!=0xf0)
{
delay(5);
temp=P3;
temp=temp&0xf0;
while(temp!=0xf0)
{
temp=P3;
switch(temp)
{
case 0xe7:num=13;
break;
case 0xd7:num=14;
break;
case 0xb7:num=15;
break;
case 0x77:num=16;
break;
}
while(temp!=0xf0)
{
temp=P3;
temp=temp&0xf0;
}
}
}
return num;

}

仔细参考下这个程序。你的程序真的是一大堆错误。

xboy3721

#include
unsigned char temp;
unsigned char code table[]={0x3f,0x06,0x5b,0x4f,
0x66,0x6d,0x7d,0x07,
0x7f,0x6f,0x77,0x7c,
0x39,0x5e,0x79,0x71};

void delay_10ms()    /*延时10MS*/
{
unsigned char i,j,k;
for(i=0;i<2;i++)
for(j=0;j<20;j++)
for(k=0;k<248;k++);
}
void scanf(unsigned char key) /*LED扫描与显示*/
{
switch(key)
{
case 0xe7:P0=0x3f;break;
case 0xeb:P0=0x06;break;
case 0xed:P0=0x5b;break;
case 0xee:P0=0x4f;break;
case 0xd7:P0=0x66;break;
case 0xdb:P0=0x6d;break;
case 0xdd:P0=0x7d;break;
case 0xde:P0=0x07;break;
case 0xb7:P0=0x7f;break;
case 0xbb:P0=0x6f;break;
case 0xbd:P0=0x77;break;
case 0xbe:P0=0x7c;break;
case 0x77:P0=0x39;break;
case 0x7b:P0=0x5e;break;
case 0x7d:P0=0x79;break;
case 0x7e:P0=0x71;break;
default:  P0=0x00;break;
}
}
void control(temp) /*确定哪个健按下啊*/
{ temp=temp&0x0f;
if( temp!=0x0f)
delay_10ms();
if( temp!=0x0f)
scanf(P3);
while(temp!=0x0f)
{
     temp=P3;
temp=temp&0x0f;
}
}

void main()
{
unsigned char a;
while(1)
{
     P3=0xff;
P3_4=0;    //确定行
a=P3;
control(a);
P3=0xff;
P3_5=0;
a=P3;
control(a);
P3=0xff;
P3_6=0;
a=P3;
control(a);
P3=0xff;
P3_7=0;
a=P3;
control(a);

}

}
自己写的，参考下

usbabc

谢过了，呵呵。。。。

各位大虾 帮忙看一下这个4*4键盘扫描程序有什么问题 在此谢过 [复制链接]

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各位大虾帮忙看一下这个4*4键盘扫描程序有什么问题在此谢过 [复制链接]